EPA · Arkansas · discharge permits by parameter
Hardness, total [as CaCO3] in Arkansas
- 3Permits carrying a limit
- 1With a recorded exceedance
- 2,593Nationwide
Permits
| Permit holder | NPDES ID | City | Program | Discharger | Receiving water |
|---|---|---|---|---|---|
| LITTLE ROCK, CITY OF/AHTD MS4 | ARS000002 | LITTLE ROCK | Large municipal storm sewer systems | Major | TRIBS,ARKANSAS RV |
Other parameters in Arkansas
- pH1,340
- Flow, in conduit or thru treatment plant1,337
- Solids, total suspended1,310
- Oxygen, dissolved [DO]1,001
- Coliform, fecal general897
- Nitrogen, ammonia total [as N]533
- BOD, 5-day, 20 deg. C512
- BOD, carbonaceous [5 day, 20 C]511
- Oil & Grease379
- Overflow volume [SS0 volume, CSO volume]348
- Overflows348
- Chlorine, total residual275
- Phosphorus, total [as P]189
- Oxygen demand, chem. [low level] [COD]166
- Pass/Fail Static Renewal 7Day Chronic Pimephales promelas120
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas120
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas120
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas120
- Coef Of Var Static Renewal 7Day Chronic Pimephales promelas120
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia120
- Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia120
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia120
- Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia119
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia119
- Nitrite + Nitrate total [as N]96
- Solids, total dissolved94
- Aluminum, dissolved [as Al]83
- Temperature, water deg. fahrenheit63
- Manganese, dissolved [as Mn]62
- Iron, dissolved [as Fe]61
- Copper, total recoverable59
- NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas58
- LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas58
- NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex58
- Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex58
- Coef Of Var Static Renewal 48Hr Acute D. pulex57
- Coef Of Var Static Renewal 48Hr Acute Pimephales promelas56
- Lead, total recoverable50
- Debris, floating [severity]48
- Zinc, total recoverable47
- Sulfate, total [as SO4]40
- Chloride [as Cl]40
- Whole Effluent Toxicity, Sub-Lethal Retest #338
- WET, sublethal retest #238
- WET, sublethal retest #138
- Whole effluent toxicity - retest #136
- Whole effluent toxicity - retest #236
- Whole Effluent Toxicity - Retest #336
- Arsenic, total recoverable35
- Whole effluent toxicity33
- Mercury, total recoverable29
- E. coli26
- Discharge flow as % of stream flow20
- Stream flow, instantaneous19
- Coliform, fecal, colony forming units18
- Nickel, total recoverable18
- Nitrogen, total [as N]17
- Selenium, total recoverable16
- Whole Effluent Toxicity [WET] - C. dubia16
- Cadmium, total recoverable15